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Cash and Cash Equivalents (Cash and cash equivalents) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Sep. 30, 2011
Jun. 30, 2011
Cash and Cash Equivalents [Line Items]        
Cash $ 14,180 $ 13,832    
Money market funds 118,306 108,228    
Cash and cash equivalents $ 132,486 $ 122,060 $ 52,576 $ 76,361